On Tue, Mar 27, 2018 at 08:57:27PM +0200, Guido.Kiener@xxxxxxxxxxxxxxxxx wrote: > Hi all, > > This is a follow up mail from the discussion of thread > https://marc.info/?l=linux-usb&m=149485247607564&w=2 > > Our working group "VISA for Linux" (IVI Foundation, www.ivifoundation.org) > > wants to extend the Linux USBTMC driver (linux/drivers/usb/class/usbtmc.c) > that can communicate with the T&M instruments. > > To meet our requirements we need some additional ioctl functions that > can send control, bulk in/out messages in a generic way. > > Kindly supported by Dave Penkler there is now a github project at > https://github.com/dpenkler/linux-usbtmc > that already supports new functions to set/get timeout, EOM flag (End > of Message), and termchar (detection of termination character). > > This project and forked repos are our playground and still under > development. > > Our experimental and generic functions are currently developed at the > fork: > https://github.com/GuidoKiener/linux-usbtmc > > For a fast read/write we want to implement new generic ioctl functions: > #define USBTMC_IOCTL_WRITE _IOWR(USBTMC_IOC_NR, 13, struct > usbtmc_message) > #define USBTMC_IOCTL_READ _IOWR(USBTMC_IOC_NR, 14, struct > usbtmc_message) > #define USBTMC_IOCTL_WRITE_RESULT _IOWR(USBTMC_IOC_NR, 15, __u64) > #define USBTMC488_IOCTL_WAIT_SRQ _IOW(USBTMC_IOC_NR, 23, unsigned int) > #define USBTMC_IOCTL_CANCEL_IO _IO(USBTMC_IOC_NR, 35) > #define USBTMC_IOCTL_CLEANUP_IO _IO(USBTMC_IOC_NR, 36) > /* For test purpose only */ > #define USBTMC_IOCTL_SET_OUT_HALT _IO(USBTMC_IOC_NR, 30) > #define USBTMC_IOCTL_SET_IN_HALT _IO(USBTMC_IOC_NR, 31) > > For further description please refer to the readme.md file at > https://github.com/GuidoKiener/linux-usbtmc/blob/master/README.md > > Open questions and comments can be just added to the wiki: > https://github.com/GuidoKiener/linux-usbtmc/wiki > > When our working group is happy with the proposed extensions and the > driver tested by several T&M companies then we would like to submit > these patches to the Linux kernel. Great, submit patches like any other developer when you have them ready. You don't need to do anything special here, that's how Linux is developed. :) Note, please do not depend on these new apis until _after_ we have merged the patches, as there might be changes required due to the review process finding problems, so please submit changes as soon as possible. thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
